最近在做安卓的系统的产品，平台是DM3730，做到休眠唤醒的时候遇到了问题，实在是走不动了，希望得到帮助：
1、软件是从官网下的TI Android ICS 4.0.3 DevKit 3.0.0，遇到的问题和我尝试解决的办法如下：
1、休眠的时候会报错，
[ 110.055938] Powerdomain (mpu_pwrdm) didn't enter target state 0
[ 110.062133] Powerdomain (neon_pwrdm) didn't enter target state 0
[ 110.068389] Powerdomain (core_pwrdm) didn't enter target state 0
[ 110.074676] Powerdomain (per_pwrdm) didn't enter target state 0
[ 110.080871] Could not enter target state in pm_suspend
[ 110.202423] cm: Module associated with clock usbhost_48m_fck didn't enable in 100000 tries
[ 110.223144] last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state
[ 110.231323] Modules linked in: omaplfb pvrsrvkm
[ 110.236053] CPU: 0 Not tainted (2.6.37 #205)
[ 110.240905] PC is at ehci_omap_enable+0x24/0x70
[ 110.245635] LR is at omap2_clk_enable+0x100/0x178
先从usb的错误入手，根据内核的提醒，我找到了问题的位置，是在恢复usb的时候失败了，从网上找了一个说
Hi Zell,
I had encountered this issue earlier. This happens in the following sequence
EHCI USB suspend -> Wake Lock driver suspend(power.0) reports an Active Wakelock, Returns EAGAIN(-11) -> EHCI USB resume
On this premature resume of EHCI USB, Interface clock enable fails and results in crash when accessing registers.
I could not find out why this clock enable fails. I have a patch which changes the order of suspend calls, moving the EHCI USB suspend to the end of driver suspend list.
Please try the attached patch and it is a hack to fix the issue.
Regards,
根据他的描述，好像是暂停和恢复的顺序问题，我按照他的patch修改了之后问题依旧，后来我就试着在睡眠和恢复的时候不调用ehci_omap_enable函数，但是测试虽然不报错了，但是却会提示
Powerdomain (usbhost_pwrdm) didn't enter target state 0
这是因为没有停止usb的时钟造成的，因为usb没有停止所以无法进去睡眠状态，所以还是需要解决这个问题的。
2、以下错误
[ 110.055938] Powerdomain (mpu_pwrdm) didn't enter target state 0
[ 110.062133] Powerdomain (neon_pwrdm) didn't enter target state 0
[ 110.068389] Powerdomain (core_pwrdm) didn't enter target state 0
[ 110.074676] Powerdomain (per_pwrdm) didn't enter target state 0
根据提示着明显是因为这几个核心无法进入休眠造成的，我用了cat /debug/pm_debug/count查看的结果是
usbhost_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 sgx_pwrdm (ON),OFF:1,RET:0,INA:0,ON:2,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
per_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 dss_pwrdm (OFF),OFF:4,RET:0,INA:4,ON:7,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
cam_pwrdm (OFF),OFF:1,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0 core_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0
neon_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0
mpu_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
iva2_pwrdm (OFF),OFF:1,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0,RET-MEMBANK3-OFF:0,RET-MEMBANK4-OFF:0
per_clkdm->per_pwrdm (13)
usbhost_clkdm->usbhost_pwrdm (3)
cam_clkdm->cam_pwrdm (0)
dss_clkdm->dss_pwrdm (0)
core_l4_clkdm->core_pwrdm (17)
core_l3_clkdm->core_pwrdm (5)
d2d_clkdm->core_pwrdm (0)
sgx_clkdm->sgx_pwrdm (2)
iva2_clkdm->iva2_pwrdm (0)
neon_clkdm->neon_pwrdm (0)
mpu_clkdm->mpu_pwrdm (0)
prm_clkdm->wkup_pwrdm (0)
cm_clkdm->core_pwrdm (0)
根据上面的提示，可以看出来确实是没有进入睡眠模式，但是usb的还好解释，虽然不能解决，但是起码知道错在哪，其他几个核心就
真的是没有头绪了，为什么不能睡眠。